A US woman who shot and killed her husband and two adult children before taking her own life is thought to have committed the shocking crime as a result of being ostracised from the religion she was raised in.

Every time I tell a mate I’m doing a story on cryptocurrency, they invariably ask me the same two questions: should they invest their own hard-earned money, and which cryptocurrency will get them a Lamborghini/yacht/island quickest?

World records that make a mockery of real achievement

Usain Bolt may be world renowned as the fastest man alive, but for one day of the year the guy who can blow up the most balloons with his nose is put on the same pedestal.

Today is Guinness World Records day, when the year's most obscure feats are rolled out for our collective amusement and disbelief.

It seems no matter how questionable the talent being tested, a Guinness official will be there with a clipboard and stopwatch to measure it for posterity.

From an Indian man who lit the most candles in his mouth to an American whose exploits with balloons are enough to give you a head spin, we count down the top five most dubious "world records" of 2015.